G.f.: Sum_{k>=1} x^(2*k-1)/(1-x^(2*k-1)) * Product_{k>=1} (1+x^k)/(1-x^k).

Terms

a(0) =0a(1) =1a(2) =3a(3) =8a(4) =17a(5) =34a(6) =64a(7) =114a(8) =195a(9) =325a(10) =526a(11) =832a(12) =1292a(13) =1970a(14) =2958a(15) =4384a(16) =6413a(17) =9276a(18) =13283a(19) =18836a(20) =26478a(21) =36924a(22) =51096a(23) =70210a(24) =95844a(25) =130019a(26) =175350a(27) =235192a(28) =313802a(29) =416618